[MLIR] Rename FusePadOpWithLinalgConsumer -> FusePadOpWithLinalgProducer (NFC)

Follow up after D128978, where I mistakenly rename the file. The linalg op is
fused with its producer, not the consumer.

mlir/lib/Dialect/Linalg/Transforms/CMakeLists.txt

@@ -8,7 +8,7 @@ add_mlir_dialect_library(MLIRLinalgTransforms
   DropUnitDims.cpp
   ElementwiseOpFusion.cpp
   ElementwiseToLinalg.cpp
-  FusePadOpWithLinalgConsumer.cpp
+  FusePadOpWithLinalgProducer.cpp
   Fusion.cpp
   FusionOnTensors.cpp
   Generalization.cpp

mlir/lib/Dialect/Linalg/Transforms/FusePadOpWithLinalgProducer.cpp

@@ -1,4 +1,4 @@
-//===- FusePadOpWithLinalgConsumer.cpp ---- Fuse pad with linalg producer -===//
+//===- FusePadOpWithLinalgProducer.cpp ---- Fuse pad with linalg producer -===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.